----configure snmptrapd----
gedit /etc/default/snmptrapd
TRAPDRUN=yes
TRAPDOPTS='-Lsd -p /run/snmptrapd.pid'
gedit /etc/snmp/snmpd
\# configure port number and ip address
agentAddress udp:161,udp6:\[3002::1111\]:161
agentAddress udp:161,udp6:161